Check if m_pChildClassFrame is a window before sending a msg
Check if m_pChildClassFrame is a window before sending a msg

dude719/Reclass-2015,dude719/Reclass-2015,dude719/Reclass-2016,dude719/ReClassEx,dude719/ReClassEx,dude719/Reclass-2015,dude719/Reclass-2016,dude719/Reclass-2016,dude719/Reclass-2015,dude719/Reclass-2015,dude719/ReClassEx,dude719/ReClassEx,dude719/Reclass-2016,dude719/ReClassEx,dude719/Reclass-2016